Demonsfx.com Scammed me Internet

I ordered from this site and a few days later the site is inaccesible,I'm unable to email them as the email given to me "orders@demonsfx.com is faulty and I reveice this dowb below when I meail them

"Your message couldn't be delivered because the recipient's email server (outside Office 365) rejected your message because it appears to violate a policy setting the recipient's email admin has set up. Commonly this is because the email server suspected your message is spam, either because of its content or because email from your email domain.

The number to contact them "0044) 239 234 8977" is unreachable  

and I was never given a tracking number.

I hope to get my money back from my bank and to make sure I only order thorugh paypal from now on.